On Tue, 2017-03-14 at 22:21 +0800, Minghsiu Tsai wrote: > The symptom is continuous log "mtk-jpeg 18004000.jpegdec: Context is NULL" > in kernel log. It is becauese the error handling in irq doesn't clear > interrupt. > > The calling flow like as below when issue happen > mtk_jpeg_device_run() > mtk_jpeg_job_abort() > v4l2_m2m_job_finish() -> m2m_dev->curr_ctx = NULL; > mtk_jpeg_dec_irq() > v4l2_m2m_get_curr_priv() > -> m2m_dev->curr_ctx == NULL > -> return NULL > log "Context is NULL" > > There is race condition between job_abort() and irq. In order to simplify > code, don't want to add extra flag to maintain state, empty job_abort() and > clear interrupt before v4l2_m2m_get_curr_priv() in irq. > > Signed-off-by: Minghsiu Tsai <minghsiu.tsai@xxxxxxxxxxxx> > --- > drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c | 14 ++------------ > 1 file changed, 2 insertions(+), 12 deletions(-) Acked-by: Rick Chang <rick.chang@xxxxxxxxxxxx>
